1, survey lofting; Stop construction lofting according to the 200mm (to ensure that the outer edge of the barbed wire fence column foundation does not cross the factory boundary) and the theoretical appearance characteristics, determine the column center line, and build a metal fence network according to the inclination and appearance of the rules. If there is a gap of 3m between columns at the corner of the boundary, the disconnection point or the intersection of roads, it can be mediated by two adjacent columns equally, but the gap should be less than 3m.

2. Foundation pit construction; The standard of column foundation pit conforms to the construction specification, and the embedded foundation is added at the pit mouth and slope according to the specific situation to ensure firmness. Box formwork shall be used for site casting, and the concrete grade shall be no less than c20. The materials used for mixing concrete and the mixture ratio, mixing, pouring and curing of concrete shall comply with the provisions of relevant standards.

3, column embedded; Stop burying columns in sections. Bury columns at both ends first, and then stay and bury the middle column. The axes of each column are on the same line, and there should be no mixed phenomenon. From the height point of view, the top of the column is smooth and curved outward, and there should be no unyielding height. Posts and hats should be strong and close to the tail.

4. The columns shall be embedded on the concrete foundation, and temporary stay cables or supports shall be set to firmly fix the columns in the proper position until the concrete hardening stops. In the concrete curing area of 14, stop installing or tightening any material zippers or supports on the columns, and all columns shall be embedded and straight according to the drawing requirements.

5. The guardrail net that meets the requirements of standards and samples shall be firmly installed on the column from the end of the column. All meshes should be tight and stable, and the installation height should meet the technological requirements. After the installation of guardrail net is completed, the final compaction treatment of column foundation should be stopped.

6. Special circumstances; The guardrail network is arranged along the stratum. In low and high areas, when the local vertical profile changes suddenly and can't resist the regular ground elevation, choose two columns to adjust the elevation or choose special-shaped mesh for gradual transition, and stop soil leveling when necessary to obtain a regular surface.